ORA-02297: cannot disable constraint -dependencies exist

I got ” ORA-02297: cannot disable constraint -dependencies exist ”  error in Oracle database.

 

ORA-02297: cannot disable constraint -dependencies exist

 

Details of error are as follows.

ORA-02297:  "cannot disable constraint (%s.%s) - dependencies exist"

*Cause: an alter table disable constraint failed becuase the table has foriegn keys that are dependent on this constraint.

*Action: Either disable the foreign key constraints or use disable cascade

 

 

cannot disable constraint -dependencies exist

This ORA-02297 error is related with the alter table disable constraint failed becuase the table has foriegn keys that are dependent on this constraint.

 

You can use the Following query to find dependent table and the dependent constraint name.

If you find it,  disable child constraint firstly and then disable parent constraint.

SELECT p.table_name "Parent Table", c.table_name "Child Table",
p.constraint_name "Parent Constraint", c.constraint_name "Child Constraint"
FROM user_constraints p
JOIN user_constraints c ON(p.constraint_name=c.r_constraint_name)
WHERE (p.constraint_type = 'P' OR p.constraint_type = 'U')
AND c.constraint_type = 'R' AND p.table_name = UPPER('&table_name')
/

 

 

Disable Constraint with Cascade option

To solve this error, Either disable the foreign key constraints or use disable cascade as follows.

 

SQL> alter table TABLE_NAME disable constraint CONSTRAINT_NAME;
Table altered.



SQL> alter table TABLE_NAME disable constraint CONSTRAINT_NAME cascade;
Table altered.

 

 

Do you want to learn Oracle Database for Beginners, then read the following articles.

Oracle Tutorial | Oracle Database Tutorials for Beginners ( Junior Oracle DBA )

 

 312 views last month,  4 views today

About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

Leave a Reply